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Blue Flame from my pipe

  #1  
Old 11-10-2010, 09:42 AM
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Question Blue Flame from my pipe

Ok so i have been riding with friends for the past few days because more bike together just seems like alot more fun. Anyway they say whenever i let of the throttle or downshift and my exhaust does it's "popping" and "crackling" a blue flame ignites frome my exhaust. Now its not a huge flame. One person says it's because the temp around here has been cooler than normal and my bike is running rich cause of this. Another says i need my PC3 re -mapped. Just curious to see if anyone else has run into this situation..hit me up i'd like to know what causes this.
 
  #2  
Old 11-10-2010, 01:08 PM
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My friend was having the same issue. He changed the spark plugs and it was all good.
 
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Old 11-10-2010, 01:35 PM
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lol ru trying to tell me you dont have afterburners?
 
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Old 11-10-2010, 01:37 PM
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Sounds like she's running rich. But it could be any number of reasons for the behavior. plugs, dirty air filter / obstructed air, weak battery causing misfires.

Colder temps, the bike should lean out a little I think. First thing I'd check is the battery charge. Colder temps would affect that first. Then maybe the air filter and hoses simply because it's easier to get to those than the plugs. Which would be next: pulling the plugs and checking their condition.
 
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Old 11-10-2010, 02:00 PM
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colder temps equal more dense air which equals leaner.


Flame out the exhaust is a sign of running rich.
 
  #6  
Old 11-10-2010, 02:10 PM
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Originally Posted by brveagle View Post

Flame out the exhaust is a sign of running rich.
That's not necessarily true.

When my old CBR would run lean (choke off) it would spit a blue flame and crackle/pop under decel. When I'd crack the choke, it'd run richer and the blue flame would stop.
 
  #7  
Old 11-10-2010, 02:32 PM
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mine pops a green flame
 
  #8  
Old 11-10-2010, 04:19 PM
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mine pops a boner
 
  #9  
Old 11-10-2010, 11:56 PM
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Flames are awesome, Im gonna go de-tune my bike! lol

Check to make sure everything else is good [filters, plugs etc] then go get the bike dyno tuned and the problem will be solved. Temps shouldn't affect it as there is a air temp sensor on the bike and the MAP sensor would read the difference in density.
 
  #10  
Old 11-11-2010, 02:13 AM
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Originally Posted by AmazinAznF4I View Post
mine pops a boner
OMG! too frakin funny!!!!

I had a VFR that had a D&D can on it and when I rev'd it up to about 10K and let off it would shoot a flame out the end. It was awesome.
 

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